Objective To find out a proper way to detect green fluorescent protein (GFP). Methods Kidneys, livers and femurs from GFP transgenic mice and C57BL/6J wild type mice were employed for in vivo study.The samples were dehydrated with alcohol and acetone individually before embedding, then frozen, paraffin and resin sections were made for the detection of GFP. C3 P12 cells which derived from calvaria bone cells of GFP transgenic mouse were used for the detection of GFP in vitro. Cells were exposed to alcohol, acetone and PBS after paraformaldehyde fixation. Laser scanning microscopy was employed for GFP detection. Results In frozen sections, both kidney and liver samples which exposed to 4% buffered paraformaldehyde fixation had strong GFP signals, while GFP signal disappeared completely in fresh frozen sections without fixation. Much stronger GFP intensity was found in acetone treated samples than in alcohol treated paraffin sections, but without apparent difference in GFP intensity in acetone and alcohol treated resin samples. Acetone and alcohol made no difference in fixed C3 cells in different time courses. Conclusion Acetone treated paraffin sections are preferable for GFP detection.

Recent studies have demonstrated that intravenous transplantation or local injection of bone marrow cells can induce unexpected changes of their fate. The results of these experiments showed that after transplantation or injecton, some of tissue specific somatic cells such as hepatocytes, skeleton, cardiac muscle cells and brain cells expressed the donor cell-specific genes, such as Y chromosome. There are two hypotheses that can explain this phenomenon. One is bone marrow stem cell transdifferentiation and the other is spontaneous cell fusion.

Objective　To find out the distribution of the normal rating dactylogram of the juveniles of the She Nationality. Methods　According to living body measure need, Prussian blue was used. Result　Each type of dactylogram in number was as follows: LU＞WS＞WD＞AT＞AS. Ridgs count of each finger in quantitative order:thumb＞ring finger＞middle finger＞index finger＞little finger. Conclusion　The rate of appearance of normal finger prints in various nationalities and regions has obvious difference, the normal rating of the dactylogram of the juveniles of the She Nationality differs from that of the local juveniles of the Han nationality.

Objective　To observe the ER ultrastructures in humn embryonic epithelial cells of colonic mucosa、renal tubule and hepatocytes and also their alterations in embryogenesis.Methods　Transmission electromicroscopy technique.Results　With the embryonic development, the ER increased in amount, became complex in structure and with its characteristic ER structures in different cells. Conclusion　The changes of ER structures are one of the characters during cell differentiation.

Objective　To study the ultrastructural changes of 8 human fetus hearts of different months Method　by TEM and SEM chemical digestion. Results　The shape and ultrastructure of myocytes became complicated gradually with development. Conclusion　All the changes are related to function of blood supply of human fetal heart.

Objective　To study the distribution of insulin-like Growth Factors (IGFs) in liver、 spleen、kidney、thymus and supraadrenal glands of fetus from 16 to 24 weeks.Method　Using ABC immunohistochemistry. Results　 IGF-I positive cells were found in these organs during this period of fetal life, but the differences of number and reaction intensity of IGF-I positive cells appeared in different organs and individuals.Conclusion　These organs tissues can express IGF-I during fetal development and play paracrine and/or autocrine role in cellular proliferation and differentiation of these fetal tissue.

Objective　To analyse the development of mouse kidney. Method　Sterological methods were used in this study.Results　The nephrogenic zone appeared in 14th day's kidney of the fetus development, medulla could be found in the late stage of fetus development kidney and developed after birth. Inner medulla were observed on 21st day after birth, nephrogenic zone disappeared on 7th day after birth. Morphometric analysis proves that medulla developed mainly after birth, cortex volume also developed rapidly after birth, especially after 21st day postnatally, the development of corpuscle number was finished before 7th day postnatally. Conclusion　The development of mouse kidney begins on 14th day of embryo and stops on 21st day after birth, the period of the medulla development is between E 18 days and 21 days after birth.

Objective　To study the effects of estradiol-17β (17β-E2) on the synthesis of GnRH and GH in submandibular gland of rat. Method　Immunohistochemical ABC method was used to observe the localization of GnRH and GH in submandibular gland of rat.Results　　The synthsis of GnRH was promoted and the synthesis of GH was inhibited by 17β-E2 in rat's submandibular gland.　Conclusion　The 17β-E2 may play an important regulative role in the synthesis of GnRH and GH.

Objective　The microvasculature of the anterior lobe, posterior lobe and cerebellar vermis was observed under the optical microscope in 6 rats. Methods　The tannic acid-ferric chloride method (TAFM) was used to stain the vessels in cerebellum. Results　The arteries within the cortex and medulla of the cerebellum originated from pia mater arteries and central branches of the cerebellar arteries, the branches of pia mater arteries mostly penetrated into the cerebellar cortex vertically and formed capillary net in the molecular layer, purkinje layer and granular layer, the arteriole in the medulla of cerebellar posterior lobe branched and formed clawed-like figurations. These vessels beneath lobule cortex connected mutually by vessel anatomosis across the medulla. Conclusion　The arteriole in the cerebellum can be manifested distinctly in a strong three-dimension by TAFM and the vessel anatomosis in deep layer of cerebellum can be easily observed.

Objective　The cells of subventricular zone in lateral wall of lateral ventricle of adult rats were localized. Method　Immunohistochemistry. Results　Polysialylated neuronal cell adhesion molecule and phosphotyrosine immunoreactive cells were found in subventricular zone, and they have same distributions, however, no any parvalbulin immunoreactive cells were found in subventricular zone. Conclusion　neuronal precursor cells in subventricular and expression of phosphotyrosine are associated with proliferation of neuronal precursor cells in subventricular zone.